Improved fuel from spent tan-bare



filliiiill tat: W a.

BENJAMIN IRVING,

OF NEW YORK, N. Y.

Letters Patent No. 83,066, dated October 13, 1868.

'mnovnn rum. PROM spam TAR-BARK.

- The Schedule refexzed'to in theu flutters-Patent and making pm of the some.

To all whom it may concern: v Be it known that; 1, Bnnommfr-lnvme," of the bay,- county, and State of New York, htivdihveritd'anw Manufacture, or Method or Prdcess'of 1\l[akin'g-Go n-.

pressed Fuel from Refuse orv SpeiitTan-Bark 'and' I do hereby declare the followingjtobe-a full description of the same.

As a preliminary to the more particular description of my invention, it may not be deemedimproper'to explain that my invention is based upon certain other improvements, made and patented by meprelating to the treating of bark forv obtaining the extmet'therefrom, in eontradistinetion to the old plan of chipping up bark, and leaching it in ,vats, to obtain the extract. By this old method of treating bark, the refuse becomes waste, and is generally a nuisance about the, tanner-y, as it is impracticable to burn it, or to form it" into any shape that it can be made to burn to advantage. My invention, therefore, is to utilize the spent tan-bark by making it into fuel. This is accomplished in the following manner: g I

The bark is soaked in water, either hotflor fe old, as deemed best. When thus properly soaked,it is'fed into a series 'of pressure-rollers, and through certain Water-baths, until it is thoroughly crushed, for the pur pose of obtaining the tannin therefrom, substantially as described in my patent of April 30, 1867, No. 64.323.

- fore described.

when thus treated, the bark is discharged from the machine in the shape of a flooky, fibrous mass of wood.

As soon as it comes from the machine, it is collected into suitable hoppers, and delivered to a press, in which I itis formed into blocks, or any other suitable form,

*for convenient size for transportation, and for making a lively fire in the grate or furnace.-

It will be obvious that the slight amount of moisture retained in the fibrous. mass after leaving the erushingrollers, and the fibrous character of it, enable it to be compressed rapidly into any required form, and, at thev same time, so solidly and toughly, by the infinite commingling of the fibres of the material, as'to'make it retain its'form when ignited in the grate or furnace, and form thereby a bed of living coals, to sustain a quick and lively fire, whether for cooking-purposes, or

for generating steam.

Having now described my invention, I will proceed to set forth what I claim, and desire to secure by Letters Patent of the United States. I

I claim the new manufacture of compressed fuel from spent or refuse tan-bark, by the method or pro oess of forming it into blocks, or other suitable shapes,

for fuel and transportation, substantially as hereinb e- Witnesses:

FRANKLIN BARBITT, CHARLES L. BABRITT.

B. IRVING. I 

